Fublin, просто точка не в том месте стояла
вот
define('_IN_JOHNCMS', 1);
$rootpath = '';
require ('incfiles/core.php');
$news0 = mysql_query("SELECT * FROM `lib` WHERE refid='16' ORDER BY id DESC LIMIT 3");
while ($res = mysql_fetch_array($news0)){
echo '<a href="library/index.php?id=' . $res['id'] . '">' . ( $res['type'] == 'bk' ? $res['name'] : $res['text'] ) . '</a><br />';
}